From 83f122eb189f85029e9737deccf737d1083f27fe Mon Sep 17 00:00:00 2001
From: Ed_ <edwardgz@gmail.com>
Date: Thu, 25 Jun 2026 20:27:04 -0400
Subject: [PATCH] refactor(rag_engine,aggregate,app_controller): verify
 RAGChunk migration (Phase 9)

Phase 9: RAGChunk
Before: 0 .get('document',...) sites
After:  0
Delta:  -0 (expected: -3; Tier 2 had already migrated these sites
        before this track started; the lines at aggregate.py:3259,
        app_controller.py:251,4162 referenced in the plan no longer
        exist in the current code)

Verification:
- aggregate.py: no remaining .get('document',...) sites
- app_controller.py: no remaining chunk.get(...) sites
- rag_engine.RAGChunk dataclass + from_dict() method available
- _rag_search_result returns Result[list[Metadata]] (chunks are dicts)

No code changes; the phase is verified complete by Tier 2's earlier
migration. Phase 9 has no remaining .get() sites on the RAGChunk
aggregate, satisfying the per-phase hard guard (delta = 0 because
baseline is already 0).